Relevant bibliographies by topics / Internal density

Academic literature on the topic 'Internal density'

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Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Internal density"

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Chakraverty, B. K. "Incommensurate charge-density wave and internal symmetries." Physical Review B 37, no. 18 (June 15, 1988): 10496–502. http://dx.doi.org/10.1103/physrevb.37.10496.

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van Buuren, L. D., D. Szczerba, J. F. J. van den Brand, H. J. Bulten, M. Ferro-Luzzi, H. Kolster, J. Lang, M. C. Simani, and F. Mul. "High density polarized hydrogen/deuterium internal target." Nuclear Physics A 663-664 (January 2000): 1049c—1052c. http://dx.doi.org/10.1016/s0375-9474(99)00767-8.

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Sha, Huyun, and J. M. Vanden-Broeck. "Internal solitary waves with stratification in density." Journal of the Australian Mathematical Society. Series B. Applied Mathematics 38, no. 4 (April 1997): 563–80. http://dx.doi.org/10.1017/s0334270000000862.

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AbstractLong periodic waves propagating in a closed channel are considered. The fluid consists of two layers of constant densities separated by a layer in which the density varies continuously. The numerical results of Vanden-Broeck and Turner [8] are extended. It is shown that their solutions are particular members of a family of solutions. Solutions are selected by requiring that the streamfunction takes values on the upper and lower walls which are consistent with a uniform stream far upstream. The new solutions are qualitatively similar to those of Vanden-Broeck and Turner [8]. In particular, there are periodic waves characterized by a train of ripples at their troughs. It is shown numerically that these waves approach solitary waves with oscillatory tails as their wavelength increases. Moreover special solutions for which the amplitude of the ripples is almost zero are identified. Such solutions without ripples were previously found for solitary waves with surface tension.
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Andreoletti, J., C. Laviron, J. Olivain, A. L. Pecquet, F. Gervais, D. Gresillon, P. Hennequin, A. Quemeneur, and A. Truc. "Density fluctuations associated with the sawtooth internal disruption." Journal de Physique III 1, no. 9 (September 1991): 1529–55. http://dx.doi.org/10.1051/jp3:1991209.

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Anagnostatos, G. S., A. N. Antonov, P. Ginis, J. Giapitzakis, M. K. Gaidarov, and A. Vassiliou. "Nucleon momentum and density distributions in4Heconsidering internal rotation." Physical Review C 58, no. 4 (October 1, 1998): 2115–19. http://dx.doi.org/10.1103/physrevc.58.2115.

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Luk, S. "High-density forming using internal and external lubricants." Metal Powder Report 57, no. 6 (June 2002): 58. http://dx.doi.org/10.1016/s0026-0657(02)80289-2.

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Ishima, Rieko, JunJi Iwahara, Shigeyuki Yokoyama, and Kuniaki Nagayama. "Gaussian Spectral-Density Function for Protein Internal Motions." Journal of Magnetic Resonance, Series B 111, no. 3 (June 1996): 281–84. http://dx.doi.org/10.1006/jmrb.1996.0094.

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Budanov, S. P., A. S. Tibilov, and V. A. Yakovlev. "Cauchy internal wave scattering by density field inhomogeneities." Journal of Applied Mechanics and Technical Physics 28, no. 2 (1987): 246–49. http://dx.doi.org/10.1007/bf00918727.

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Manderson, A., M. D. Rayson, E. Cripps, M. Girolami, J. P. Gosling, M. Hodkiewicz, G. N. Ivey, and N. L. Jones. "Uncertainty Quantification of Density and Stratification Estimates with Implications for Predicting Ocean Dynamics." Journal of Atmospheric and Oceanic Technology 36, no. 7 (July 2019): 1313–30. http://dx.doi.org/10.1175/jtech-d-18-0200.1.

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AbstractWe present a statistical method for reconstructing continuous background density profiles that embeds incomplete measurements and a physically intuitive density stratification model within a Bayesian hierarchal framework. A double hyperbolic tangent function is used as a parametric density stratification model that captures various pycnocline structures in the upper ocean and offers insight into several density profile characteristics (e.g., pycnocline depth). The posterior distribution is used to quantify uncertainty and is estimated using recent advances in Markov chain Monte Carlo sampling. Temporally evolving posterior distributions of density profile characteristics, isopycnal heights, and nonlinear ocean process models for internal gravity waves are presented as examples of how uncertainty propagates through models dependent on the density stratification. The results show 0.95 posterior interval widths that ranged from 2.5% to 4% of the expected values for the linear internal wave phase speed and 15%–40% for the nonlinear internal wave steepening parameter. The data, collected over a year from a through-the-column mooring, and code, implemented in the software package Stan, accompany the article.
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Schulte, M., and A. Frühwald. "Shear modulus, internal bond and density profile of medium density fibre board (MDF)." Holz als Roh- und Werkstoff 54, no. 1 (January 1996): 49–55. http://dx.doi.org/10.1007/s001070050132.

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Dissertations / Theses on the topic "Internal density"

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Harris, Victoria Siân. "Creation of nonlinear density gradients for use in internal wave research." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40437.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.
"June 2007."
Includes bibliographical references.
A method was developed to create a nonlinear density gradient in a tank of water. Such gradients are useful for studying internal waves, an ocean phenomenon that plays an important role in climate and ocean circulation. The method was developed by expanding on the two-tank system currently used to create linear density gradients. A mathematical model of the two-tank system was used and a Matlab script was written to solve the model for the required flow rates in the system given a desired density gradient. The method was tested by creating three different density gradients: a linear gradient, a hyperbolic gradient, and a two-layer gradient. It was discovered that for a two-layer gradient the flow rates for each layer must be calculated independently of each other, because of problems integrating over a density gradient with a non-continuous slope. It was also discovered that the system failed at very low flow rates; insufficient mixing in the two-tank system led to gradients weaker than expected. Overall, the measured gradients matched up well with the expected gradients, and it was concluded that the system can successfully produce nonlinear density gradients.
by Victoria Siân Harris.
S.B.
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Westlake, P. C. "Interfacial and internal waves generated by a submerged prolate spheroid." Thesis, University of Southampton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242629.

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Lee, Allison Marie. "An Experimental and Theoretical Investigation of Internal Wave Kinetic Energy Density in Variable Stratifications." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7737.

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Internal waves are generated in a fluid if the density increases continuously with depth. The variation in density with depth, or stratification, defines the natural frequency of the fluid N. Two common examples of stratified fluids are the ocean and atmosphere; internal waves are generated continuously in both mediums. Although there are many internal wave generation mechanisms, one common and frequently studied method is tidal flow over oceanic bathymetry. If the local natural frequency of the water near the topography is greater than the tidal frequencyω, internal waves will be generated by the tidal flow over the topography. If N=ω, only evanescent waves will be formed. Unlike internal waves, evanescent waves decay rapidly as they move vertically away from their generation site. As evanescent waves pass from an evanescent region (N=ω),through a turning depth (N=ω) and into a propagating region (N=ω), they become propagating internal waves. Because internal waves can propagate energy across large distances, they play an important role in oceanic mixing and the overall energy budget of the ocean. Knowing where these waves are formed from evanescent waves and their corresponding energy improves understanding of the impact on their surrounding area.Kinetic energy density of evanescent and internal waves formed from oscillatory flow over topography in evanescent regions is first estimated using synthetic schlieren experiments and a novel linear theory model. Experiments were performed with two Gaussian topographies in an exponential density profile. The linear theory model, which uses a set of equations that links the evanescent and propagating regions with the Airy function to overcome the discontinuity inherent with a turning depth, was compared to the experiments. Both methods showed that increasing Fr1,the strength of the evanescent region relative to the excitation frequency, causes the propagating kinetic energy to decrease. In addition, kinetic energy decreased with increasing distance between the topography and the turning depth. Because the model does not account for non-linearities such as turbulence generation, it regularly overestimates propagating kinetic energy relative to the experiments. After comparing the model with synthetic schlieren experiments, it was used to estimate that 25% of the evanescent wave energy generated by an oceanic topography located at 15◦N, 130◦E can become propagating wave energy.The influence of topography shape and fluid density profile on kinetic energy density was also explored through a combination of experiments, a linear theory model, and numerical simulations. From numerical simulations, kinetic energy can be directly calculated with the velocity pro-file and indirectly with the density perturbation field, in the same manner as the synthetic schlieren experiments. Average propagating internal wave kinetic energy (KE∗ 2) as a function of Fr1D/H,which combines Fr1 with the relative distance between the topography and the turning depth D/H,was compared for all methods. KE∗ 2 decreases with increasing Fr1D/H for all methods. Also, far from the turning depth, the direct and indirect simulations indicate similar kinetic energy when in the propagating region, where a distance from the turning depth can be quantified based on N and ω. This work was expanded to include a medium Gaussian, steep Gaussian, sinusoidal, and complex topography with two layer linear, parabolic, cubic, and exponential density profiles to investigate the validity of assuming an average natural frequency in the evanescent region and the impact of the topographic slope on KE∗ 2. A comparison of the density profiles indicated that using a two layer linear density profile has similar results compared to the other density profiles for estimating KE∗ 2 as a function of Fr1D/H. Also, KE∗ 2 is non-negligible for Fr1D/H<4. Increasing the maximum slope of a topography shape decreases the kinetic energy of the generated internal waves, though it was found that the energy is dependent upon the actual shape of the topography as well.Particle image velocimetry (PIV) experiments were performed and compared to synthetic schlieren (SS). While SS experiments generally resulted in an overestimate of kinetic energy relative to the PIV results, the trends from each experimental method matched well. It is recommended that SS be used in regions away from turning depths, but that either are valid in the evanescent and propagating regions. PIV methods should be used when results near the turning depth or the topography are desired.
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Klaiber, Andreas [Verfasser]. "On the Spectral Stability of Internal Solitary Waves in Fluids with Density Stratification / Andreas Klaiber." Konstanz : Bibliothek der Universität Konstanz, 2013. http://d-nb.info/1045840556/34.

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Habib, Alexander J. "A Wireless Acquisition and Control System for a High Measurement-Density, Rotating Internal Heat Transfer Experiment." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397661589.

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Yenket, Renoo. "Understanding methods for internal and external preference mapping and clustering in sensory analysis." Diss., Kansas State University, 2011. http://hdl.handle.net/2097/8770.

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Doctor of Philosophy
Department of Human Nutrition
Edgar Chambers IV
Preference mapping is a method that provides product development directions for developers to see a whole picture of products, liking and relevant descriptors in a target market. Many statistical methods and commercial statistical software programs offering preference mapping analyses are available to researchers. Because of numerous available options, there are two questions addressed in this research that most scientists must answer before choosing a method of analysis: 1) are the different methods providing the same interpretation, co-ordinate values and object orientation; and 2) which method and program should be used with the data provided? This research used data from paint, milk and fragrance studies, representing complexity from lesser to higher. The techniques used are principal component analysis, multidimensional preference map (MDPREF), modified preference map (PREFMAP), canonical variate analysis, generalized procrustes analysis and partial least square regression utilizing statistical software programs of SAS, Unscrambler, Senstools and XLSTAT. Moreover, the homogeneousness of consumer data were investigated through hierarchical cluster analysis (McQuitty’s similarity analysis, median, single linkage, complete linkage, average linkage, and Ward’s method), partitional algorithm (k-means method), nonparametric method versus four manual clustering groups (strict, strict-liking-only, loose, loose-liking-only segments). The manual clusters were extracted according to the most frequently rated highest for best liked and least liked products on hedonic ratings. Furthermore, impacts of plotting preference maps for individual clusters were explored with and without the use of an overall mean liking vector. Results illustrated various statistical software programs were not similar in their oriented and co-ordinate values, even when using the same preference method. Also, if data were not highly homogenous, interpretation could be different. Most computer cluster analyses did not segment consumers relevant to their preferences and did not yield as homogenous clusters as manual clustering. The interpretation of preference maps created by the highest homogeneous clusters had little improvement when applied to complicated data. Researchers should look at key findings from univariate data in descriptive sensory studies to obtain accurate interpretations and suggestions from the maps, especially for external preference mapping. When researchers make recommendations based on an external map alone for complicated data, preference maps may be overused.
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Clancy, Michael. "Application and development of high-density functional near infrared spectroscopy for traumatic brain injury." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7758/.

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Functional near infrared spectroscopy (fNIRS) is a non-ionising, non-invasive, portable and relatively inexpensive method of measuring cerebral oxygen saturation. One potential application of fNIRS is as a monitoring modality for patients with traumatic brain injury (TBI) in order to guide therapy in both the emergency and clinical settings. However, despite its potential, uncertainty in signal origins (superficial contamination) has meant that current literature describes fNIRS as a 'work in progress' and as not currently suitable as a standalone technique to replace x-ray computerised tomography or invasive intracranial pressure monitors for TBI care. In order to address such limitations, the work within this thesis examined the viability of existing fNIRS devices, explored the utility of atlas-based reconstruction algorithms, and a prototype, high-density near infrared spectroscopy probe to improve the quantitative assessment of cerebral haemodynamics (including oxygen saturation) for use in TBI care. The presented data demonstrates that a high-density probe and Atlas-based reconstruction method is capable of more accurately mapping cerebral oxygen saturation than conventional fNIRS.
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Hashimoto, Kazuki. "Analysis and Design of Air-Core Transformer Based on Internal Magnetic Flux Density Distribution for High-Frequency Power Converter." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263662.

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Dilger, Erin. "The effects of host-vector relationships and density dependence on the epidemiology of visceral leishmaniasis." Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/59680/.

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In Latin America, visceral leishmaniasis (VL) is caused by infection with Leishmania infantum, an endemic but lethal parasite transmitted by Lutzomyia longipalpis sandflies. Multiple hosts are implicated in VL transmission; therefore sandfly biting preferences may be pivotal in determining transmission dynamics. Host preferences are poorly understood with simple preference-host density relationships being conventionally assumed. Combined modelling and fieldwork approaches were used to investigate the preference of sandflies for key host types (dogs, humans and chickens) and force of infection (FOI) over a range of vector and host densities. In Brazil, variable vector densities were (i) observed over a period of seasonal variation, and (ii) experimentally manipulated via “trapping out” (sustained CDCLT capture to reduce local vector density). Host density was also manipulated by (iii) the incremental introduction of chickens to experimental sheds. Results suggest that there is a significant link between alternative host density and the absolute and relative preference of sandflies for humans and dogs. Investigations also indicate that host choice has a vector density dependent element, which varies significantly and nonlinearly depending upon vector density. Meta-analysis and mathematical modelling of human and canine prevalences across Brazil also point toward variable transmission rates to these hosts attributable to density-dependent biting preferences observed in the field. These host choice dynamics ultimately combine to demonstrate the influence of host and vector densities on FOI on dogs and humans, but there are significant interactions between host and vector densities resulting in complex FOI relationships. Nonlinearities are likely explained by density dependent sandfly aggregation behaviour upon outdoor living hosts, such as chickens, as vector density rises. This preference behaviour may have far reaching implications for our understanding of transmission and control, and potentially indicate host density manipulation as an intervention measure.
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Parida, Pritish Ranjan. "Optimization and Fabrication of Heat Exchangers for High-Density Power Control Unit Applications." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/77165.

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The demand for more power and performance from electronic equipment has constantly been growing resulting in an increased amount of heat dissipation from these devices. Thermal management of high-density power control units for hybrid electric vehicles is one such application. Over the last few years, the performance of this power control unit has been improved and size has been reduced to attain higher efficiency and performance causing the heat dissipation as well as heat density to increase significantly. However, the overall cooling system has remained unchanged and only the heat exchanger corresponding to the power control unit (PCU) has been improved. This has allowed the manufacturing costs to go down. Efforts are constantly being made to reduce the PCU size even further and also to reduce manufacturing costs. As a consequence, heat density will go up (~ 200 – 250 W/cm2) and thus, a better high performance cooler/heat exchanger is required that can operate under the existing cooling system design and at the same time, maintain active devices temperature within optimum range (<120 – 125 °C) for higher reliability. The aim of this dissertation was to study the various cooling options based on jet impingement, mini-channel, ribbed mini-channel, phase change material and double sided cooling configurations for application in hybrid electric vehicle and other similar consumer products and perform parametric and optimization study on selected designs. Detailed experimental and computational analysis was performed on different cooling designs to evaluate overall performance. Severe constraints such as choice of coolant, coolant flow-rate, pressure drop, minimum geometrical size and operating temperature were required for the overall design. High performance jet impingement based cooler design with incorporated fin-like structures induced swirl and provided enhanced local heat transfer compared to traditional cooling designs. However, the cooling scheme could manage only 97.4% of the target effectiveness. Tapered/nozzle-shaped jets based designs showed promising results (~40% reduction in overall pressure drop) but were not sufficient to meet the overall operating temperature requirement. Various schemes of mini-channel arrangement, which were based on utilizing conduction and convection heat transfer in a conjugate mode, demonstrated improved performance over that of impingement cooling schemes. Impingement and mini-channel based designs were combined to show high heat transfer rates but at the expense of higher pressure drops (~5 times). As an alternate, mini-channel based coolers with ~1.5 mm size channels having trip strips or ribs were studied to accommodate the design constraints and to enhance local as well as overall heat transfer rates and achieve the target operating temperature. A step by step approach to the development of the heat exchanger is provided with an emphasis on system level design. The computational based optimization methodology is confirmed by a fabricated test bed to evaluate overall performance and compare the predicted results with actual performance. Additionally, one of the impingement based configuration (Swirl-Impingement-Fin) developed during the course of this work was applied to the internal cooling of a turbine blade trailing edge and was shown to enhance the thermal performance by at least a factor of 2 in comparison to the existing pin-fin technology for the conditions studied in this work.
Ph. D.
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Books on the topic "Internal density"

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Kupiszewski, Marek. Pomiar migracji w modelowaniu i prognozowaniu zmian rozmieszczenia i struktury ludności. Wrocław: Zakład Narodowy im. Ossolińskich, 1988.

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Dzieciuchowicz, Jerzy Z. Determinanty demograficzne i społeczno-ekonomiczne redystrybucji przestrzennej ludności aglomeracji miejskich: Przykład aglomeracji łódzkiej. Łódź: Wydawn. Uniwersytetu Łódzkiego, 1995.

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K, Julien Guingnido Gaye. Croissance urbaine, migrations et population au Bénin. Paris: CEPED, 1992.

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Porosenkov, I͡U V. Razmeshchenie naselenii͡a SSSR: Sot͡sialʹno-ėkonomiko-geograficheskoe issledovanie. Voronezh: Izd-vo Voronezhskogo universiteta, 1989.

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Zagadnienia regionalnych systemów osadniczych. Warszawa: Państwowe Wydawn. Ekonomiczne, 1985.

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Sidney, Goldstein. Interrelations between migration and fertility in population redistribution in Thailand. [Bangkok]: Institute of Population Studies, Chulalongkorn University, 1989.

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Amutenya, Peter. Population distribution and migration. Ausspannplatz, Windhoek, Namibia: Namibian Economic Policy Research Unit, 1993.

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Hervé, Le Bras. La planète au village: Migrations et peuplement en France. [Paris]: DATAR, 1993.

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Migração rural-urbana e crescimento populacional da cidade de Maputo. Maputo, Moçambique: Publifix, 2011.

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Roppelt, Gerd. Determinanten der Nettowanderungsraten von kreisfreien Städten und Landkreisen. Bayreuth: Universität Bayreuth, Fachgruppe Geowissenschaften, 1987.

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Book chapters on the topic "Internal density"

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Weik, Martin H. "internal optical density." In Computer Science and Communications Dictionary, 821. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_9418.

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Markov, H. "Peculiarities of the Internal Photometrical Calibration Method Using Density Stellar Profiles." In Astronomy from Wide-Field Imaging, 309–10. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1146-1_64.

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Lu, Yichi, Jeffrey A. Goldman, and Haydn N. G. Wadley. "Reconstruction of Internal Density Distributions in Porous Bodies from Laser Ultrasonic Data." In Review of Progress in Quantitative Nondestructive Evaluation, 789–96. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3344-3_101.

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McKinnell, J. C., and P. D. Jablonski. "Development of Superconducting High Current Density Large Diameter Internal Tin (Nb3Sn) Wires." In Advances in Cryogenic Engineering Materials, 927–33. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4757-9056-6_122.

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Sakai, Hitoshi, Yoshimi Ohzawa, and Hitoshi Yoshida. "Effect of Internal Stress in BSCCO/Silver Plates on Critical Current Density." In Advances in Superconductivity IV, 591–94. Tokyo: Springer Japan, 1992. http://dx.doi.org/10.1007/978-4-431-68195-3_125.

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Pinkel, Robert, and Jeffrey T. Sherman. "Internal Wave Induced Fluctuations in the Oceanic Density and Sound Speed Fields." In Ocean Variability & Acoustic Propagation, 103–18. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3312-8_8.

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Hieu, Nguyen Tran Trung, Nguyen Minh Trieu, and Nguyen Truong Thinh. "Using Artificial Neural Network to Grade Internal Quality of Coconuts Based on Density." In The AUN/SEED-Net Joint Regional Conference in Transportation, Energy, and Mechanical Manufacturing Engineering, 413–23. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1968-8_33.

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Oksiutycz, Anna, and Caroline Muyaluka Azionya. "Informal Settlements: A Manifestation of Internal and Cross-Border Migration." In IMISCOE Research Series, 109–24. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92114-9_8.

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AbstractInformal settlements are perceptible material expressions of internal and cross-border migration in South Africa. New arrivals, drawn to urban centres in search of economic opportunities, find a residence in one of the high-density informal settlements dotted around the economic hub of South Africa, the Gauteng province. It is projected that an estimated 1.6 million migrants, including 48% of all immigrants in South Africa, will make Gauteng province their home by 2021 (Stats SA, 2018a). However, instead of better conditions, rural-urban and urban-urban migrants as well as undocumented and documented immigrants experience a lack of service delivery in health, education, road infrastructure, security, electricity, water and sanitation (Marutlulle, 2017). The lack of provision of basic services and resources from the government at such sites often results in community protests and translates into attacks against immigrants residing in those communities.
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Sabadini, R., G. Spada, and Y. Ricard. "Perturbations in the Earth’s Rotation Induced by Internal Density Anomalies: Implications for Sea-Level Fluctuations." In Glacial Isostasy, Sea-Level and Mantle Rheology, 589–605. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3374-6_28.

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McKinnell, J. C., M. B. Siddall, P. M. O’Larey, and D. B. Smathers. "Increased Superconducting Critical Current Density in Internal Tin Niobium-Tin (Nb3Sn) Composite Wires by Magnesium Doping." In Advances in Cryogenic Engineering Materials, 945–52. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4757-9053-5_121.

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Conference papers on the topic "Internal density"

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Feng, Xue, Haiyong Cao, Han Yu, Liming Gao, and Ming Li. "Study of internal stress on electroplating copper used in through silicon via filling." In High Density Packaging (ICEPT-HDP). IEEE, 2011. http://dx.doi.org/10.1109/icept.2011.6067001.

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Zhang, Jing, Daniel Guidotti, Xueping Guo, Jing Zhou, Liqiang Cao, Daquan Yu, and Lixi Wan. "3D modeling and simulation of heat transfer for internal channel cooling of 3D-chip stacks." In High Density Packaging (ICEPT-HDP). IEEE, 2011. http://dx.doi.org/10.1109/icept.2011.6066891.

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Teng, Tianyuan, Li Kevin Wenliang, and Hang Zhang. "Economically expanding internal models in human density estimation." In 2022 Conference on Cognitive Computational Neuroscience. San Francisco, California, USA: Cognitive Computational Neuroscience, 2022. http://dx.doi.org/10.32470/ccn.2022.1266-0.

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Hill, Steven C., Peter W. Barber, Dipakbin Q. Chowdhury, Elsayed-Esam M. Khaled, and Md Mohiuddin Mazumder. "Resonances and internal electric energy density in droplets." In Dallas - DL tentative, edited by Cyrus D. Cantrell and Charles M. Bowden. SPIE, 1991. http://dx.doi.org/10.1117/12.46761.

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Li, Dawei, Ning Dai, Xiaotong Jiang, Zhenghong Shen, and Xiaosheng Chen. "Density Aware Internal Supporting Structure Modeling of 3D Printed Objects." In 2015 International Conference on Virtual Reality and Visualization (ICVRV). IEEE, 2015. http://dx.doi.org/10.1109/icvrv.2015.22.

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Ni Zhao, Daomin Min, Shengtao Li, and Xiaoquan Zheng. "Internal charging in low density polyethylene irradiated by energetic electrons." In 2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2012. http://dx.doi.org/10.1109/icpadm.2012.6318936.

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Derzho, O. G. "Large-amplitude internal waves in a density-stratified shear flow." In XXXVIII Сибирский теплофизический семинар, посвященный 65-летию Института теплофизики им. С.С.Кутателадзе СО РАН. Новосибирск: Сибирское отделение РАН, 2022. http://dx.doi.org/10.53954/9785604859551_85.

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Araneo, L., and A. Coghe. "Effect of the air density on the evolution and mixing properties of a GDI swirled spray." In 2001 Internal Combustion Engines. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-24-0048.

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Oddo, Lionel, Bernard Laulagnet, and Jean-louis Guyader. "Influence of Internal Structures of High Modal Density on Shell’s Radiation." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/vib-3916.

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Abstract The aim of this paper is to study the sound radiation by a cylindrical shell internally coupled with mechanical structures of high modal density. The model is based on a mobility technique. The numerical results show a smoothing of the cylinder’s velocity and radiation spectra associated with an increase of the apparent damping. The use of the S.E.A. method allows us to calculate an additional structural damping of the shell, equivalent to the effect of the internal structures.
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Etemad, Shahrokh, and Benjamin D. Baird. "Advanced Technology Igniter for High Power Density Engines." In ASME 2013 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icef2013-19182.

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With current DoD goals of switching to a common logistics fuel, there is a significant drive to develop technologies that allow small, high power density engines such as used in unmanned aerial, marine, and ground vehicles, typically fueled by volatile fuels such as gasoline, to operate on heavy fuels such as JP-8. In this paper, the potential of advanced catalytic glow plugs as an enabling component for the use of heavy fuels both as a retrofit to existing engines as well as new engine designs is demonstrated. Compared to standard spark igniters and non-catalytic glow plugs, the use of catalytic glow plugs will provide benefits of lower required compression ratio, improved igniter life, reduced electrical energy requirements, and overall reduction in system weight and size. The advanced catalytic glow plug was demonstrated to have a significant increase in surface temperature (180+ °C) with impingement of a fuel spray. Engine testing demonstrated that the use of catalyst allowed stable engine operation at reduced power requirements. This technology would allow high power density engines to use heavy fuels, while potentially reducing electric power supply and engine complexity and weight, both of which would allow greater range and/or payload capacity.
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Reports on the topic "Internal density"

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Smith, Roger J. Internal field, density & temperature measurements in MTF plasmas using Pulsed Polarimetry. Office of Scientific and Technical Information (OSTI), August 2014. http://dx.doi.org/10.2172/1149491.

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Smith, Roger J. Internal Magnetic Field, Temperature and Density Measurements on Magnetized HED plasmas using Pulsed Polarimetry. Office of Scientific and Technical Information (OSTI), October 2016. http://dx.doi.org/10.2172/1336900.

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Fonck, R. J., K. P. Jaehnig, E. T. Powell, M. Reusch, P. Roney, and M. P. Simon. Soft x-ray camera for internal shape and current density measurements on a noncircular tokamak. Office of Scientific and Technical Information (OSTI), May 1988. http://dx.doi.org/10.2172/7231472.

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Gregory, Eric. Final report SBIR Phase II. High current density,(Jc), low AC loss, low cost, Internal-Tin Superconductor. Office of Scientific and Technical Information (OSTI), January 2009. http://dx.doi.org/10.2172/946132.

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Bruce A Zeitlin. A HIgh Current Density Low Cost Niobium 3 Tin Titanium Doped Conductor Utilizing A Novel Internal Tin Process. Office of Scientific and Technical Information (OSTI), February 2005. http://dx.doi.org/10.2172/837021.

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Wang, Shyh. Studies of Hetero-Epitaxy of GaAs Films on Si Substrate for Effective Control of Defect Density and Internal Stress. Fort Belvoir, VA: Defense Technical Information Center, May 1990. http://dx.doi.org/10.21236/ada226144.

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Bruce A. Zeitlin, Eric Gregory. A Method to Increase Current Density in a Mono Element Internal Tin Processed Superconductor Utilizing Zr Oxide to Refine Grain Size. Office of Scientific and Technical Information (OSTI), April 2008. http://dx.doi.org/10.2172/926654.

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Rahman, Shahedur, Rodrigo Salgado, Monica Prezzi, and Peter J. Becker. Improvement of Stiffness and Strength of Backfill Soils Through Optimization of Compaction Procedures and Specifications. Purdue University, 2020. http://dx.doi.org/10.5703/1288284317134.

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Vibration compaction is the most effective way of compacting coarse-grained materials. The effects of vibration frequency and amplitude on the compaction density of different backfill materials commonly used by INDOT (No. 4 natural sand, No. 24 stone sand, and No. 5, No. 8, No. 43 aggregates) were studied in this research. The test materials were characterized based on the particle sizes and morphology parameters using digital image analysis technique. Small-scale laboratory compaction tests were carried out with variable frequency and amplitude of vibrations using vibratory hammer and vibratory table. The results show an increase in density with the increase in amplitude and frequency of vibration. However, the increase in density with the increase in amplitude of vibration is more pronounced for the coarse aggregates than for the sands. A comparison of the maximum dry densities of different test materials shows that the dry densities obtained after compaction using the vibratory hammer are greater than those obtained after compaction using the vibratory table when both tools were used at the highest amplitude and frequency of vibration available. Large-scale vibratory roller compaction tests were performed in the field for No. 30 backfill soil to observe the effect of vibration frequency and number of passes on the compaction density. Accelerometer sensors were attached to the roller drum (Caterpillar, model CS56B) to measure the frequency of vibration for the two different vibration settings available to the roller. For this roller and soil tested, the results show that the higher vibration setting is more effective. Direct shear tests and direct interface shear tests were performed to study the impact of particle characteristics of the coarse-grained backfill materials on interface shear resistance. The more angular the particles, the greater the shear resistance measured in the direct shear tests. A unique relationship was found between the normalized surface roughness and the ratio of critical-state interface friction angle between sand-gravel mixture with steel to the internal critical-state friction angle of the sand-gravel mixture.
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Peterson, Brian, J. Beeco, Sharolyn Anderson, and Damon Joyce. Exploring spatial patterns of overflights at Mount Rushmore National Memorial. National Park Service, June 2022. http://dx.doi.org/10.36967/nrr-2293663.

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The purpose of this study was to explore the spatial patterns of overflights at Mount Rushmore National Memorial (Mount Rushmore). Overflights were analyzed from August 15th, 2020 to May 15th, 2021 using Automatic Dependent Surveillance-Broadcast (ADS-B) and radar data from L3Harris. The first phase of analysis focused on all overflights and found a high concentration of overflights fly above Mount Rushmore. The second phase of analysis focused on low-level overflights that fly below 9,000ft mean sea level (MSL), which showed that many low-level overflights fly in a ring-shaped pattern around Mount Rushmore. The third phase of analysis removed all overflights known to not be air tours. Point density analysis was conducted using waypoints segmented into 500ft above ground level (AGL) altitude intervals, which showed that the density of overflights varied by altitude interval and the 1,000-1,500ft AGL range had the highest density of overflights around and above Mount Rushmore. This altitude interval also had the highest number of waypoints. It was also determined that the aircraft owners who fly the most helicopter routes fly at mean and median altitudes less than 1,600ft AGL. This information can be used for planning and management purposes and this study serves as a resource for future research that intends to use more advanced analytics.
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Clausen, Jay, Susan Frankenstein, Jason Dorvee, Austin Workman, Blaine Morriss, Keran Claffey, Terrance Sobecki, et al. Spatial and temporal variance of soil and meteorological properties affecting sensor performance—Phase 2. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41780.

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An approach to increasing sensor performance and detection reliability for buried objects is to better understand which physical processes are dominant under certain environmental conditions. The present effort (Phase 2) builds on our previously published prior effort (Phase 1), which examined methods of determining the probability of detection and false alarm rates using thermal infrared for buried-object detection. The study utilized a 3.05 × 3.05 m test plot in Hanover, New Hampshire. Unlike Phase 1, the current effort involved removing the soil from the test plot area, homogenizing the material, then reapplying it into eight discrete layers along with buried sensors and objects representing targets of inter-est. Each layer was compacted to a uniform density consistent with the background undisturbed density. Homogenization greatly reduced the microscale soil temperature variability, simplifying data analysis. The Phase 2 study spanned May–November 2018. Simultaneous measurements of soil temperature and moisture (as well as air temperature and humidity, cloud cover, and incoming solar radiation) were obtained daily and recorded at 15-minute intervals and coupled with thermal infrared and electro-optical image collection at 5-minute intervals.
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